Merge branch 'main' of github.com:DigitalBox98/SimpleExtJSApp

Add SYNO.ux.FormPanel

Add example on SYNO.JsonStore

Add documentation to API.Store constructor

SimpleExtJSApp : addition of widgets

Merge branch 'main' of https://github.com/DigitalBox98/SimpleExtJSApp

Update on docs for : UX/TextArea SDS/AppInstance 3rdparty/USBCopy

Merge branch 'main' of https://github.com/DigitalBox98/SimpleExtJSApp

Add files via upload